000 AGXX40 KNHC 300725 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 325 AM EDT FRI MAR 29 2013 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND TROPICAL N ATLC...AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... HIGH PRES CENTERED ACROSS NORTHERN FLORIDA WILL SHIFT SLOWLY EASTWARD THROUGH MON NIGHT...ALLOWING ANTICYCLONIC S-SE FLOW TO DOMINATE THE REGION THROUGH THE WEEKEND. EXPECT RIDGE AXIS TO REMAIN ACROSS THE NORTHERN GULF ALONG 27N-28N THE NEXT SEVERAL DAYS. COMPUTER MODELS SHOW STRONG HIGH PRES BUILDING SOUTH OVER THE CENTRAL PLAINS MON AND MON NIGHT...PUSHING A COLD FRONT INTO THE NORTHERN GULF EARLY TUE AND EXTEND FROM N FLORIDA TO 26N94W TO NE MEXICO BY TUE EVENING...WITH STRONG NE WINDS AND BUILDING SEAS INDICATED N AND W OF THE FRONTAL BOUNDARY. GFS MODEL SHOWS A WAVE DEVELOPING ALONG THE FRONT WED WHICH INCREASES THE PRES GRADIENT ACROSS NORTHERN WATERS. SW N ATLC S OF 31N W OF 55W... HIGH PRES CONTINUES TO SHIFT EASTWARD ACROSS NORTHERN FLORIDA INTO THE SW N ATLC. ASCAT PAS AT 0110 UTC SHOWED FRESH TO STRONG W-NW WINDS N OF 27N HAVE MOVED EAST OF THE FORECAST AREA. HIGH PRES RIDGE WILL BECOME WELL ESTABLISHED ALONG 28N THROUGH MON NIGHT. FRESH EASTERLY TRADES ARE EXPECTED S OF 22N AND MODERATE TO FRESH SW WINDS WILL DEVELOP N OF 29N SUN AND MON AS A COLD FRONT N OF THE AREA SWEEPS OFF THE EAST COAST OF THE U.S. GFS MODEL SHOWS STRONG HIGH PRES PUSHING SOUTH INTO THE GULF OF MEXICO TUE AND WED WITH WINDS SHIFTING E-NE AS HIGH PRES SETTLES OVER THE OHIO VALLEY. GFS AND ECMWF MODELS IN RELATIVELY GOOD AGREEMENT WITH THIS SCENARIO...AND A BLEND OF THE TWO WAS USED. CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W... ASCAT PASS AT 0247 UTC INDICATED AN AREA OF STRONG E-NE WINDS OFF THE COAST OF COLOMBIA CENTERED NEAR 12.0N 74.5W. AS HIGH PRES SLOWLY SHIFTS E OVER THE NEXT FEW DAYS...A TIGHT PRES GRADIENT OVER THE REGION WILL ALLOW FRESH TO STRONG TRADE WINDS TO PERSIST ACROSS MOST OF CENTRAL CARIBBEAN AND BUILD MAX SEAS TO 12-13 FT BY LATE TONIGHT OR EARLY SUN. EXPECT MAX SUSTAINED WINDS TO 30 KT NEAR THE COAST OF COLOMBIA WITH OCCASIONAL GUSTS TO GALE FORCE THROUGH MON. WINDS AND SEAS WILL DIMINISH TUE AND WED IN THE CENTRAL CARIBBEAN AS HIGH PRES SHIFTS E INTO CENTRAL ATLC AND TROUGHING SETS UP NORTH OF THE AREA...BUT SUPPORTING A BROAD AREA OF FRESH TRADES ACROSS THE TROPICAL N ATLC. WARNINGS... GULF OF MEXICO... .NONE. CARIBBEAN SEA AND TROPICAL N ATLC... .NONE. SW N ATLC... .NONE. EFFECTIVE 20 MARCH 2013...TAFB GRIDDED MARINE FORECASTS FOR 10-M WINDS...10-M WIND GUSTS...SIGNIFICANT WAVE HEIGHTS AND HAZARDS ARE AVAILABLE IN THE NATIONAL DIGITAL FORECAST DATABASE (NDFD) ON AN EXPERIMENTAL BASIS AT: HTTP://PREVIEW.WEATHER.GOV/GRAPHICAL ADDITIONAL INFORMATION IS AVAILABLE AT WWW.NWS.NOAA.GOV/OM/NOTIFICATION/PNS13OFFSHORE_HIGHSEAS.HTM NOTE...GRIDDED MARINE FORECASTS AT WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE WILL BE DISCONTINUED ONCE THE "OCEANIC" VIEW IS ADDED TO THE EXPERIMENTAL NDFD GRAPHICAL INTERFACE. $$ FORECASTER MUNDELL